Nathan Bowling, assistant professor at Wright State University and colleagues Kevin Eschleman and Qiang Wang undertook an analysis of the results of 223 studies carried out between 1967 and 2008. The studies investigated the combination of job satisfaction and life satisfaction or subjective well-being. The study also found a positive relationship between job satisfaction and life satisfaction, indicating that the two are linked. The causal link between subjective well-being and subsequent levels of job satisfaction was found to be stronger than the link between job satisfaction and subsequent levels of subjective well-being.